Boring device.



UNTE OFFCE,

DONALD MAGGREGOR, OIF PORTLAND, OREGON, ASSIGNOR OF ONE-HALF TO JOHNBOYD, 0F PORTLAND, OREGON.

BORING DEVICE.

To @ZZ whom it may concern Re it known that I, DoNALD MaoGneoon, acitizen of the United States, residing in the city of Portland, countyof Multnomah,

and State of Oregon, have invented certain new and useful Improvementsin Boring Devices, of which the following is a specification.

My invention relates to boring devices, and more particularly to apower-driven boring device designed and adapted especially for boringthrough, or into, the stump of a tree for the purpose of making a holein which a lire can be started, or into which a "charge of explosive canbe inserted for the purpose of burning or blowing out said stump.

Among the salient objects of my invention are, to provide a simple,practicable and successful, power-actuated boring device, capable ofbeing easily transported from place to place and having a capacity whichadapts it for boring holes through all sizes of stumps, no matter howlarge they Imay be; to provide a device of the character ing a parthereof, and in which,-

Figure 1 is a top plan view thereof; and Fig. 2 is a side elevationthereof.

Referring now to the drawings, 1 and 9 designate two supportingstandards, which may be mounted upon any suitable base or bed plate, as3, and each of which is pro vided with a plurality of bearing sockets,as l, 5 and 6. Hingedly and interchangeably mounted in correspondingbearing sockets of said standards is what I will call a power frame,composed of two parallel side bars or pipes.l 7 8, coupled fiXedlytogether by means of end pieces or castings 9 and 10, with a drivingshaft 11 rotatably mounted therethrough, as indicated, and carrying uponits outer end a driving pulley 19., and

Specification of Letters Patent.

Application filed December 20, 1912.

Patented Dec. 2, 1913.

serial No. 737,794.

upon its inner end a beveled gear 13. Said power frame is hingedlymounted and supported in the bearing sockets of said. standards by meansof suitable bearing hooks 11i- 14, which are adapted to pass throughsaid standards 1 and i2, adjacent the bearing sockets in use, with theirhooked portions around the side pipe or bar 8, and their opposite endsprovided with nuts, 15H15, whereby the hooked portions can be tight cnedaround the pipe 8, as may be desired.

The casting 10, it will be noted, is of L shape, with a portion thereof,designated 10 constituting au end or bearing casting for what l willcall a boring frame and which also comprises two parallel bars or pipesltr-17, having their forward ends secured within the part 10 of thecasting 10, and having their opposite ends fixedly secured together bymeans of an end casting, as 18, which said casting 18 is adjustablyattached to a slotted standard, 19, by means of a bolt and nut at Q0,whereby it can be raised and lowered into different angular positionsand there secured by means of said bolt Q0. The lower end of saidslotted standard 19 is jointed, as at 21, and made adjustable by meansof a bolt and nut at 22, said standard being mounted upon the base 3.

Slidably mounted upon the parallel bars or pipes 16-17, is a feed head28, rotatably mounted in which is the end of a driving shaft Q11, hereshown to be square in cross section, and extended forwardly through thecasting 10', and provided at its forward end with an auger chuck 25,adapted to receive an auger' ill. Mounted upon said driving shaft Q4 isa beveled gear 27, having an integral sleeve portion Q7 within the boxor bearing of the casting 10', said beveled gear 27 being positioned tomesh with the gear 13 so as to be driven therefrom, whereby to drivesaid driving shaft Q11 through said gear 27 and its sleeve 27, and atthe same time permit said shaft 24 to be moved longitudinallytherethrough in either direction. As a means for 'feeding said shaft 211forwardly or for withdrawing it rearwardly, a bearing sleeve 28 ismounted upon the feed head 23 to receive a shaft 29, provided at itsupper end with a crank 30, and at its lower end with a sprocket wheel31.

Str-etched between the end castings 18 and 10', and parallel with thebars or pipes 1G* 17, is a sprocket chain 32, with means at its forwardend, as at 33, for tightening the same, as may be desired. rl`hissprocket chain is positioned to be engagedbyv the sprocket wheel 31 sothat when the latter is turned in either direction by means of thel handcrank 30, the feed head 23 and the driving shaft 24 are moved forwardlyor l rearwardly, according to the direction in which said crank isturned, thus feeding the auger 2G forwardly, or moving it backwardly,asin withdrawing it from the bore being made to discharge the borings orshavings therefrom. ln order to hold the chain against the sprocket andto prevent disengagement, the feed head 23 is provided at its lowerside, adjacent the chain and at opposite sides of the sprocket wheel 3l,with two downwardly depending lug elements 234-34.

Any suitable power furnishing mechanism may be usedvalthough I prefer toemploy a light gasolene engine of two or three horse power, which can bemounted upon the base at any suitable kposition for driving the pulleyl2. have shown no form of power mechanism, as this forms no part of theinvention.

By providing the standards 1 and 2 with different bearing sockets, as 4,5 and G, the power frameand the forward end of the boring frame may beadjusted to as many different heights. As shown in Fig. 2, said partsare mounted in the lowest position, and the parts are in posit-ion forboring into a stump in a straight horizontal line` By means of theslotted standard 19, the rear end of the boring frame can be raised todifferent heights, thereby giving different angles to the boring shaft24, thus making it possible to bore directly into and through a stump ona horizontal line, or at most any angle desired.

It will thus be seen that I have provided a light boring device whichcan bc moved .from place to place by two men, and one in which the augeris power actuated, and in which the auger can, during its operation beywithdrawn repeatedly to discharge the shavings.. This can beaccomplished without stopping theengine, thus making it possibley tovery quickly bore a hole straight through a large stump, or to boreydown into one at any angle. The length of the shaft 24 makes it;possible to bore through a very large stump and in case the stump islarger through than the shaft 24 and auger combined, after the auger andshaft have entered the stump:

for some distance, the supporting base and the whole device can be movedclose upy against the stump, thereby gaining the distance from the endof the auger to the bor-v ing frame, represented by the auger, the augerchuck and the projecting end of the power shaft 24, as shown in Fig. 2.

l am aware that modiiications can be made in the embodiment of theinvention here 1 shown and described without departing from the spiritthereof, and I do not, therefore, limit the invention to this specificform, except as I may be limited by the hereto appended claims.

l claim: l. A portable boring device for boring stumps of trees,comprising a base, supporting standards mounted thereupon, a power framewith power shaft therein, a boring frame adjustably mounted upon saidbase, an angular bearing casting rigidly connecting said power frame andsaid boring fra-me with each other at right angles, said frames beinghingedly connected to said standards, beveled gears in mesh with eachother in the angle of said casting and driven from said power shaft, adriving` shaft mounted `in .'aid boring frame, through one of said gearsand movable longitudinally therethrough, said shaft being provided withholding means for an auger at its forward end and with a feed headslidably mounted upon said boring frame at its rear\,vard end, and meansfor mechanically movingsaid feed head and said boring shaftlongitudinally through said boring frame and beveled" gear,substantially as shown and described.

2. A boring device of the character referred to comprising incombination, a supporting base, supporting standards mounted thereupon,a power frame ustably mounted upon said standards and provided withpower shaft having a driving pulley and a gear, a boring frame connectedat its forward end, at right angles, to said power frame, and providedwith adriving shaft rotatably mounted therein and adapted to be adjustedlongitudinally therethrough, an auger carried by the forward end of saiddriving shaft, a driving gear meshing with said first gear and throughwhich said driving shaft has a driving and sliding connection, and afeed mechanism connected at the rear end of said driving shaft in saidboring frame, whereby to move said shaft longitudinally in eitherdirection during the boring operation.

3. In a boring device of the character referred to, in combination, asupporting base, supporting standards mounted thereupon,l a power frameadjustably and pivotally mounted on said standards and provided with apower shaft having a driving pulley and a beveled gear at its oppositeends; a boring frame connected at its forward end and at an anglethereto with said power frame, and provided with a driving shaftrotatably and slidably mounted therein, and provided at its forward endwith an auger,

"a beveled gear having a bearing in said frame and meshing with saidfirst mentioned beveled gear, to be driven therefrom, said driving shafthaving a drivnig and' sliding connection therethrough, whereby to bedriven by said gear, said boring frame being vertically adjustable atits rear end, a supporting standard for the rear end of said boringframe and feed mechanism connected at the rear end of said driving shaftfor moving it longitudinally, for the purpose mentioned.

Ll. A boring device, comprising in combination, a supporting base,supporting vertical standards mounted thereupon, a power frameadjustably and hingedly mounted on said standards and provided with apower shaft having a driving pulley and a beveled gear, a boring framecomprising parallel shafts secured together at their opposite ends andrigidly connected at their forward ends, at an angle to said powerframe, and provided with a driving shaft rotatably and slidably mountedtherein, and provided at its forward end with an auger, a feed headslidably mounted upon said parallel shafts and secured to the rear endof said driving shaft, a beveled driving gear upon said driving shaftand meshing with said first gear, whereby to be driven thereby, asprocket chain secured at its opposite ends to the opposite ends of saidboring frame, a sprocket wheel rotatably mounted upon said feed head,movable therewith and meshing with said sprocket chain, whereby topositively move said feed head and driving shaft longitudinally ineither direction, with means for operating said sprocket wheel, andmeans for adjusting said boring frame and driving shaft vertically intodifferent. angular positions, substantially as described.

Signed at Portland, Oregon, December 13th, 1912.

DONALD MACGREGOR.

In presence of* R. B. FRENCH, WARREN P. SMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

. Washington, D. C.

